God didn't stop them.

The reason is because it was God the Father’s will.

When Father Abraham was tested,

he did not withhold his only son, but offered him in faith.

Then, an angel of God called out,

"Abraham, Abraham," preventing him from harming his son Isaac

and ensuring no harm came to him

(Genesis 22:11-12; Hebrews 11:17).

However, God the Father did not spare His only begotten Son, Jesus Christ,

but gave Him up for us all, allowing Roman soldiers to crucify Jesus

and even letting one soldier pierce Jesus' side with a spear

(Romans 8:32; John 19:18, 23, 34).

God the Father did not stop these soldiers.

Instead, He willed for His only begotten Son, Jesus Christ,

to be crushed and suffer affliction

(Isaiah 53:10).

It was God's will that Jesus Christ be wounded

and endure pain to become the atoning sacrifice for sins

(Isaiah 53:10).